Omron CJ-Series Operation Manual page 16

Application Precautions
• Do not apply voltages or connect loads to the Output Units in excess of
the maximum switching capacity. Excess voltage or loads may result in
burning.
• Disconnect the functional ground terminal when performing withstand
voltage tests. Not disconnecting the functional ground terminal may result
in burning.
• Double-check all wiring and switch settings before turning ON the power
supply. Incorrect wiring may result in burning.
• Check switch settings, the contents of the DM Area, and other prepara-
tions before starting operation. Starting operation without the proper set-
tings or data may result in an unexpected operation.
• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera-
tion.
• Resume operation only after transferring to the new CPU Unit the con-
tents of the DM Area, HR Area, and other data required for resuming
operation. Not doing so may result in an unexpected operation.
• Do not pull on the cables or bend the cables beyond their natural limit.
Doing either of these may break the cables.
• Do not place objects on top of the cables or other wiring lines. Doing so
may break the cables.
• Do not use standard retail RS-232C personal computer cables. Always
use the special cables listed in this manual or make cables according to
manual specifications. Using standard, commercially available cables
may damage the external devices or CPU Unit.
• When replacing parts, be sure to confirm that the rating of a new part is
correct. Not doing so may result in malfunction or burning.
• When transporting or storing circuit boards, cover them in antistatic mate-
rial to protect them from static electricity and maintain the proper storage
temperature.
• Do not touch circuit boards or the components mounted to them with your
bare hands. There are sharp leads and other parts on the boards that
may cause injury if handled improperly.
• Do not short the battery terminals or charge, disassemble, heat, or incin-
erate the battery. Do not subject the battery to strong shocks. Doing any
of these may result in leakage, rupture, heat generation, or ignition of the
battery. Dispose of any battery that has been dropped on the floor or oth-
erwise subjected to excessive shock. Batteries that have been subjected
to shock may leak if they are used.
• UL standards require that batteries be replaced only by experienced tech-
nicians. Do not allow unqualified persons to replace batteries.
• After connecting Power Supply Units, CPU Units, I/O Units, Special I/O
Units, or CPU Bus Units together, secure the Units by sliding the sliders at
the top and bottom of the Units until they click into place. Correct opera-
tion may not be possible if the Units are not securely properly. Be sure to
attach the end cover provided with the CPU Unit to the rightmost Unit. CJ-
series PLCs will not operate properly if the end cover is not attached.
• Incorrect data link table or parameter settings may cause unexpected
operation. Even when the data link table and parameters have been set
correctly, do not start or stop the data link before verifying that it is safe to
do so.
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